include/linux/firmware.h

   1 #ifndef _LINUX_FIRMWARE_H
   2 #define _LINUX_FIRMWARE_H
   3
   4 #include <linux/module.h>
   5 #include <linux/types.h>
   6 #include <linux/compiler.h>
   7 #include <linux/gfp.h>
   8
   9 #define FW_ACTION_NOHOTPLUG 0
  10 #define FW_ACTION_HOTPLUG 1
  11
  12 struct firmware {
  13         size_t size;
  14         const u8 *data;
  15 };
  16
  17 struct device;
  18
  19 struct builtin_fw {
  20         char *name;
  21         void *data;
  22         unsigned long size;
  23 };
  24
  25 /* We have to play tricks here much like stringify() to get the
  26    __COUNTER__ macro to be expanded as we want it */
  27 #define __fw_concat1(x, y) x##y
  28 #define __fw_concat(x, y) __fw_concat1(x, y)
  29
  30 #define DECLARE_BUILTIN_FIRMWARE(name, blob)                                 \
  31         DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob))
  32
  33 #define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size)                      \
  34         static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \
  35         __used __section(.builtin_fw) = { name, blob, size }
  36
  37 #if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE))
  38 int request_firmware(const struct firmware **fw, const char *name,
  39                      struct device *device);
  40 int request_firmware_nowait(
  41         struct module *module, int uevent,
  42         const char *name, struct device *device, gfp_t gfp, void *context,
  43         void (*cont)(const struct firmware *fw, void *context));
  44
  45 void release_firmware(const struct firmware *fw);
  46 #else
  47 static inline int request_firmware(const struct firmware **fw,
  48                                    const char *name,
  49                                    struct device *device)
  50 {
  51         return -EINVAL;
  52 }
  53 static inline int request_firmware_nowait(
  54         struct module *module, int uevent,
  55         const char *name, struct device *device, gfp_t gfp, void *context,
  56         void (*cont)(const struct firmware *fw, void *context))
  57 {
  58         return -EINVAL;
  59 }
  60
  61 static inline void release_firmware(const struct firmware *fw)
  62 {
  63 }
  64 #endif
  65
  66 #endif